Chemistry - Mole Concept Question with Solution | TestHub

$n$ vol H₂O₂ solution means 1 mL of H₂O₂ solution liberates $n$ mL of O₂ at STP.

10 Vol of H₂O₂ solution means 1 mL solution of H₂O₂ liberates 10 mL of O₂ at STP.

The strength of $n$ vol. H₂O₂ solution is given by the expression:

$strength=\frac{68}{22400}\times n\times 1000=\frac{680}{224}ng{L}^{-1}$

In 1 mol, the amount present will be $\frac{68}{22400}ng=3.03\times 10^{-3}ng$

Since $n=10$,

$3.03\times 10^{-3}\times 10=3.03\times 10^{-2}g=0.0303g$